Adjustable trestle.



No. 781,994. PATENTED JUNE 23, 1903. L. G. GANTRELL.

ADJUSTABLBTRESTLE.

APPLICATION FILED AUG. 9. 1902.-

H0 MODEL.

UNITED STATES Patented June 23, 1903.

PATENT OFFICE.

LOUIS GORBY CANTRELL, OF NASHVILLE, TENNESSEE, ASSIGNOR OF ONE-HALF TOJOSEPH M. JOHNSON, OF NASHVILLE, TENNESSEE.

ADJUSTABLE TRESTLE.

SPECIFICATION formingpart of Letters Patent N 0. 731,994, dated June 23,1903. Application filed August 9, 1902. Serial No- 119,0l7. (.No modeLi'To all whom it may concern:

Be it known that I, LOUIS GORBY CAN- TRELL, a citizen of the UnitedStates, residing at Nashville, in the county of Davidson and State ofTennessee, have invented a new and useful Adjustable Trestle, of whichthe following is a specification.

This invention relates generally to trestles, and more particularly toan adjustable trestle particularly adapted for use of painters,carpenters, and the like.

The object of the invention is to provide a simple and durableconstruction of trestle which can be quickly and easily adjusted and onewhich can be folded into a very small compass when not in use.

Another object is to provide a trestle which can be used either singlyor in series.

With these objects in view the inventionconsists in the novel featuresof construction, combination, and arrangement, all of which will befully described hereinafter and pointed out in the claim.

In the drawings forming part of this specification, Figure 1 is aperspective view of a trestle constructed in accordance with myinvention. Fig. 2 is a detail viewshowing the manner of connecting thestringer to the supporting-standards. Fig. 3 is a sectional view showingsuch connection. Fig. 4 shows a slightly-modified construction ofsupportingstandards, Fig. 5 is a detail of such modification. Fig. 6 isa view showing construction employed when the trestle is arranged inseries. Fig. 7 is a view showing the extensible stringer.

In carrying out my invention I employ a horizontal bar or stringer A,having the vertical end pieces A connected to its ends, said piecesbeing braced by means of the oblique braces A Ordinarily this stringer Aconsists of a single piece; but, if desired, it may be made in twoparts, the inner ends having loops A connected thereto and through whichthe extension-bar A slides. By this construction the stringer can beextended or contracted, as desired. The vertical end pieces A are eachprovided with the plurality of depending hooks B, which are adapted toengage the horizontal pins B, which extend across the grooved portion ofthe standards 0, said groove being a compound one, the inner portionbeing adapted to receive the hooks B,

while the outer portion of said groove is intended to receive verticalend pieces A. The standards 0 are supported by means of the inclinedlegs 0', connected at their upper ends to the upper end of the standard,the lower ends of said legs being connected by means of a cross-piece Cand upon which the lower end of the standard rests, as most clearlyshown in Fig. 1. Each end piece A has a U- shaped clamp D pivotedthereto at D, the free ends of said clamp being adapted toengage thedepending fastening-plates D secured upon opposite sides of the standard0, and by reference to Fig. 3 it will be noted that the clamps andplates are arranged intermediate the hooks and pins. After the hookshave been brought into engagement with the pins the clamps are turned soas to bring their free ends into engagement with the plates D and inthis manner the stringer is securely locked to the standard, andinasmuch as there are a plurality of pins and also a plurality of platesit is obvious that the stringer can be adjusted to any desired heightbetween the standards.

In Fig. 6 I have shown a double standard or one having both facesgrooved, so that two stringers are adapted to be connected thereto.

In Fig. 4 I have shown the standards supported by means of legs Gpivotally connected to a plate 0 and provided with claw-feet C in orderto avoid slipping. This construction I have found particularly adaptedfor the use of bricklayers, and this form of support can be used inconnection with the other form, if so desired, or both ends of thestringer may be supported by a standard held in this manner. The otherportions ofthe standard are exactly the same, and the operations of thevarious parts are identical.

The construction and operation as well as the advantages of a trestleconstructed in accordance with my invention will be apparent to everyone skilled in the art to which it appertains.

Having thus fully described my invention, inner grooves, hook memberscarried by the What Iclaim as new, and desire to secure by end piecesand adapted to engage said pins,

Letters Patent, is-- I and supporting-legs secured to the standards. 10

In a trestle, the'combination with a stringer, LOUIS GORBY OANTRELL. 5of end pieces secured thereto, standards hav- Witnesses: I

ing compound grooves in their inner faces, H. B. CARNEY,

horizontal pins arranged transversely in the H. W. BASHAW.

